From: Heiko Carstens Date: Sat, 4 Feb 2017 10:40:36 +0000 (+0100) Subject: s390: make setup_randomness work X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=da8fd820f389a0e29080b14c61bf5cf1d8ef5ca1;p=linux.git s390: make setup_randomness work Commit bcfcbb6bae64 ("s390: add system information as device randomness") intended to add some virtual machine specific information to the randomness pool. Unfortunately it uses the page allocator before it is ready to use. In result the page allocator always returns NULL and the setup_randomness function never adds anything to the randomness pool. To fix this use memblock_alloc and memblock_free instead. Fixes: bcfcbb6bae64 ("s390: add system information as device randomness") Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 1a3388c32a839..aaef71ff7ab75 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -822,10 +822,10 @@ static void __init setup_randomness(void) { struct sysinfo_3_2_2 *vmms; - vmms = (struct sysinfo_3_2_2 *) alloc_page(GFP_KERNEL); - if (vmms && stsi(vmms, 3, 2, 2) == 0 && vmms->count) + vmms = (struct sysinfo_3_2_2 *) memblock_alloc(PAGE_SIZE, PAGE_SIZE); + if (stsi(vmms, 3, 2, 2) == 0 && vmms->count) add_device_randomness(&vmms, vmms->count); - free_page((unsigned long) vmms); + memblock_free((unsigned long) vmms, PAGE_SIZE); } /*